Method of treating fibers for paper making and other uses



Patented July 26, 1932 UNITED STATES PATENT OFFICE LOGAN A. DILS, OFCHICAGO, ILLINOIS, ASSIGNOR TO KELLOGG ISILS, INC. OF OHICAGO, ILLINOIS,A CORPORATION OF DELAWARE j METHOD OI-TREA'IING FIBERS FOR PAPER MAKINGAND OTHER USES N0 Drawing. Application filed July 24, 1930, Serial No.470,536. Renewed December 12, 1931.

This invention relates to a process of treating certain classes of woodyfibers, such as hemp,flax straw, bagasse, and the. like, for the purposeof freeing the cellulose fibers thereof from the enveloping lignin inorder to obtain the said fibers for paper making and other uses. Withthis object in view the invention consists, generally stated, in subjecting the said Woody materials to the action of an aqueous solution ofsodium borate, sodium hydroxide and trisodium phosphate at atmosphericpressure, for a period of time varying from ten to twenty minutes,depending upon the specific Woody material under treatment, at atemperature of approximately 220 F. to 225 F., and then taking thecooked woody materials and subjecting them to the action of a beater fora period varying from one -to three hours. When bagasse is thus cookedin a solution for a period varying from ten to fifteen minutes, and thensubjected to the action of a beater for a period varying from one tothree hours, the fibers are found to be of most excellent quality forcertain classes of papers, such as a substitute for manila paper andcover stock.

The specific proportions of the chemicals employed may vary somewhat,but it has been found that the following formula gives most excellentresults, that is, a solution composed of:

Y Per cent Water u 50 Sodium borate 39 Sodium hydroxide 10 Tri-sodiumphosphate 1 The chemicals are first preferably mixed together until theybegin to liquefy or assume the form of a thick heavy paste. This mixtureof chemicals is then placed in an open vessel and the water added andthe temperature brought up to approximately 220 F. by the application ofextraneous heat, such, for example, as by the use of a gas burner.

The woody material, such .as hemp, flax straw, bagasse or the like, isthen subjected to the action-of this solution for a period ofapproximately twelve minutes. The period of time maybe slightly less orslightly more to the action of an aqueous solution of sodium than this,depending somewhat upon the class of the material being treated, orcooked, as it is technically known.

After the woody material has thus been acted upon by said chemicalsolution, it is taken therefrom and placed in an ordinary beater of thekind usually employed in paper making plants. If old hemp rope forms thestarting Woody material, it should be beaten for from fifteen to twentyminutes. With bagasse it has been found that beating for a period of onehour gives very satisfactory results as does beating for two or threehours.

By this process fibrous woody materials of the character indicated canbe cooked at atmospheric pressure, within a period of about fifteenminutes, and then beaten, and is ready for use in paper making Within anhour or two'additional, and fibers of a very superior quality for use inpaper making or other uses obtained.v

lVhat is claimed is:

1. The method of treating woody materials, which consists in subjectingthe same to the action of an aqueous solution'of sodium borate, sodiumhydroxide and .tri-sodium phosphate. v

2. The method of treating woody ma-- terials, which consists insubjecting the same borate, sodium hydroxide and tri-sodium phosphate atatmospheric pressure.

3. The method of treating woody materials, which consists in subjectingthe same to the action of an a ueous solution of sod um borate, sodium'hy oxide and tri-sodium phosphate at atmospheric pressure for a periodof approximately 12 minutes.

4. vThe method of treating woody materials, which consists in subjectingthe same to the action of an aqueous solution of sod um borate, sodiumhydroxide and tri-sodlum phosphate at a temperature of approximately 220F. v

. 5. The method of treat1ng woody materiais, which consists insubjecting the same to the action of an aqueous solution of sodiumborate, sodium hydroxide and trisodium, phosphate at atmosphericpressure and at a temperature of approximately 6. The method of treatingwoody materials, which consists in subjecting the same to the action ofan aqueous solution of sodium borate, sodium hydroxide and tri-sodiumphosphate for a period of approximately 12 terial from said solution andbeating the same.

9. .The method of treating woody materials, which consists in subjectingthe same to the action of an aqueous solution of sodium borate, sodiumhydroxide and tri-sodium phosphate at atmospheric pressure and thenremoving the woody material from the solution andbeating the same. I

10. The method of treating woody materials,- which consists insubjecting the same to the action of an aqueous solution of sodiumborate, sodium hydroxide and tri-sodium phosphate at atmosphericpressure for a. period of approximately 12 minutes and then. removing te woody material from the solution and beating the same.

11. The method of treating woody materials, which consists in subjectingthe same to the action of an aqueous so ution of sodium. borate, sodiumhydroxide and tri-sodium phosphate at a temperature ofapproximate- 1y220 F. and then removing the woody material'from the solution andbeating the same.

12. The method of treating woody materials, which consists in subjectingthe same to the action of an a ueous solution of sodium borate, sodiumhy roxide and tri-sodium phosphate at atmospheric pressure and at atemperature of approximately 220 F. and

then removing the woody material from the solution and beating the same.

13. The method of treating woody materials, which consists in subjectingthe same to the action of an aqueous solution of sodium.

borate, sodium hydroxide and tri-sodium phosphate for a period ofapproximately 12 minutes and then removin the woody material from thesolution andieating the same.

14. The method of treating woody ma,-

terials, which consists in subjecting the same to the action of anaqueous solution of sodium borate,, sodium hydroxide and tri-sodiumphosphate at atmospheric pressure for a period of approximately 12minutes and at atemperature of about 220 F. and then removing the woodymaterial from the solution and beating the same.

15. The method of treating woody materials, which consists in subjectingthe same to the action of an aqueous solution of sodium borate, sodiumhydroxide and tri-sodium phosphate and then removing the woody materialfrom said solution and beating the same for from one to two hours.

16. The method of treating woody materials, which consists in subjectingthe same to the action of an aqueous solution of sodium borate, sodiumhydroxide and tri-sodium phosphate at atmospheric pressure and thenremoving the woody material from the solution and beating the same forfrom one to two hours.

17. The method of treating woody materials, which consists in subjectingthe same to the action of an aqueous solution of sodium borate, sodiumhydroxide and tri-sodium phosphate at atmospheric pressure for a periodof approximately 12 minutes 'and then' removing the woody material fromthe solution and beating thesame for from one to two hours.

18. The method of treating woody mato the action of an aqueous solutionof sodium borate, sodium hydroxide and tri-sodium.

phosphate at a temperature of approximately 220 F. and then removing thewoody material from the solution and beating the same for from one totwo hours.

19. The method of treating woody materials, which consists in subjectingthe same to the action of an aqueous solution of sodium borate, sodiumhydroxide and tri-sodium phosphate at atmospheric pressure and at atemperature of approximately 220 F. and then removing the woody materialfrom the solution and beating the same for from one to two hours.

20. The method of treating woody materials, which consists in subjectingthe same to the action of an aqueous solution of sodium borate, sodiumhydroxide and tri-sodium phosphate for a period of approximately 12minutes and then removing the woody material from the solution andbeating the same for from one to two hours.

21. The method of treating woody materials, which consists in subjectingthe same to. the action of an aqueous solution of sodium borate, sodiumhydroxide and tri-sodium phosphate at atmospheric pressure for a periodof approximately 12 minutes and at a temperature of about 220 F. andthen removing the woody material from the solution and beating the samefor from one to two hours.

22. The method of treating woody materials, which consists in subjecting"the same to a solution comprising approximately 50.

percent water, 39. per cent sodium borate, 10.

percent sodium hydroxide,- and 1. percent trisodium phosphate for aperiod of approxi mately 12 minutes.

25. The method of treating woody materials, which consists in subjectingthe same to a solution comprising approximately 50. percent water, 39.percent sodium borate, 10, percent sodium hydroxide, and 1. percenttrisodium phosphate, at a temperature of about 220 F.

26. The method of treating woody ma- 25 terials, which consists insubjecting the same to a solution comprising ap roximately-50.

percent water, 39. ercent sodium borate, 10. percent sodium hy roxide,and 1. percent trisodium phosphate at atmospheric pressure, for a periodof approximately 12 minutes.

27. The method oftreating woody ma terials, which consist in subjectingthe same to a solution comprising approximately 50. percent water, 39.ercent sodium borate, 10. I5 percent sodium hy roxide, and 1. percenttrisodium phosphate at atmospheric. pressure at a temperature of about220 F. 28. The method of treating woody materials, which consists insubjectingthe same 0 to a solution comprising approximately 50. percentwater, 39. ercent sodium borate, 10. percent sodium hy roxide, and 1.percent trisodlum phosphate, at atmosphenc .pressure for a period ofapproximately 12 minutes and 5 at a temperature of about 220 F.

29. The method of treating woody materials, which consists in subjectingthe same to a solutioncomprising ap roximately 50. percent water,-39.ercent sodium borate, 10. 1' percent sodium hy roxide,"and 1. percenttrisodium phosphate, and then beating the same. i 30. The method oftreating woody materials, which consists in subjecting the same to asolution comprising approximately 50. i percent water, 39. percentsodium borate, 10. percent sodium hydroxide, and 1. percent trisodiumphosphate at atmospheric pressure, and then beating the same.

31. The method of treating woody materials, which consists in subjectingthe same to a solution comprising approximately 50. percent water, 39.percent sodium borate, 10. percent sodium liy roxide, and 1. percenttrisodium phosphate for a period of approximately 12 minutes, and thenbeating the same.

32. The method of treating woody materials, which consists in subjectingthe same to a solution comprising approximately 50.

percent water, 39. ercent sodium borate, 10. percent sodium hy roxide,and 1. percent trisodium phosphate, at a temperature of about 2209' F.,and then beating the same.

33. The method of treating woody materials, which consists in subjectingthe same to a solution comprising approximately 50. percent water, 39.percent sodium borate, 10. percent sodium hydroxide, and 1. percenttri-sodium phosphate at atmospheric pressure, for a period ofapproximately 12 minutes, and then beating the same.

34. The method of treating woody materials, which consists in subjectingthe same to a solution comprising approximately 50. percent water, 39.percent sodium borate, 10. percent sodium hydroxide, and percenttri-sodium phosphate at atmospheric pressure at a temperature of about220 F., and thenbeating the same. I

35. The method of treating woody materials, which consists in subjectingthe same to a solution comprising approximately 50.

percent water, 39. percent sodium borate, 10. percent sodium'hydroxide,and 1. percent tri-sodium phosphate, at atmospheric pressure -for aperiod of approximately 12 minutes and at a temperature of about 220 F.,and then beating the same;

6. The process of treating bagasse, which consists in subjecting thesame to an aqueous solution of sodium borate, sodium hydroxide andtri-sodium phosphate.

37. The process of treating bagasse, which consists in subjecting thesame to an aqueous solution of sodium borate, sodium hydroxide andtri-sodium phosphate, at atmospheric pressure.

, 38. The process of treating bagasse, which consists in subjecting thesame to an aqueous solution of sodium borate, sodiumhydroxide andtri-sodium phosphate, for approximately.

12 minutes.

39. The process of treating bagasse, which consists in subjecting thesame to an aqueous solution of. sodium borate, sodium hydroxide andtri-sodium phosphate, at a temperature of about 220 F.

40. The process of treating bagasse, whichconsists in subjecting thesame to an-aqueous solution of sodium borate, sodium hydroxide andtri-sodium phosphate, at atmospheric pressure, for approximately 12minutes.

41. The process of treating bagasse, which consists in subjecting thesame to an aqueous solution of sodium borate, sodium hydroxide andtri-sodium phosphate, at atmospheric pressure, at a temperature of about220 F.

42. The process of treating bagasse, which consists in subjecting thesame to an aqueous solution of sodium borate, sodium hydroxide andtri-sodiumphdsphate, for approximate 1y 12 minutes, andat a temperatureof about 220 F 43. The process of treating bagasse, which consists insubjecting the same to an aqueous 5 solution of sodium borate, sodiumhydroxide and tri-sodium phosphate, and then beating the same. 1 44. Theprocess of treating bagasse, which. consists in subjecting the same toan aqueous solution of sodium borate, sodium hydroxide and tri-sodiumphosphate, at atmospheric pressure, and thenbeating the same. j 45. Theprocess oft-mating bagasse, which I consists in subjecting the same ,toan aqueous solution of sodiumborate, sodium hydroxide and tri-sodiumphosphatefior approximately 12 minutes, and then beating the same.

46. The process of treating bagasse, which consists in subjecting thesame to. an aqueous solution'of sodium borate, sodium hydroxide andtri-sodium phosphate, at a temperature of about 220 F., and then beatingthe same.

47 The process of treating bagasse, which consists in subjecting thesame to an aqueous solution of sodium borate, sodium hydroxide andtri-sodium phosphate, at atmospheric pressure, for approximately 12minutes, and y then beating the same.

48. The process of treating bagasse, which consists in subjecting thesame to an aqueous solution of sodium borate, sodium hydroxide,

and tri-sodium phosphate, at atmospheric pressure, at a temperature ofabout 220 F.,

and then beating the same.

49. The process of treating bagasse, which consists in subjectingthesame to an aqueous solution of sodiumborate, sodium hydroxide andtri-sodium phosphate, for approximately 12 minutes, and at a temperatureof about 40 220 F., and then beating the same.

50. The process ,of treating bagasse which. consists in subjecting thesame for about 12 minutes to the action of a solution comprisingapproximately the following proportions: Water 50.%; sodium borate 39.%;sodium hydroxide l0.% and tri-sodium phosphate 1.%, at a temperature ofabout 51. The process of treating bagasse which consists in subjectingthe same for about 12 minutes to the-action of a solution compris- 4 ingapproximately thefollowing proportions: Water 50.%; .sodium borate 39.%;sodium hydroxide l0.%; and tri-sodium 55 phosphate l.%, at a temperatureof about 220 F., and then beatingthe bagasse for from one to threehours.

In testimony whereof I have signed this specification. LOGAN DILS.

